Hey @Brahim,
This is not a widget that our plugins are generating. This is a widget from some other plugin or from your theme that is using the ‘av-‘ prefix in its CSS.
We unfortunately cannot help with software that is not our own, especially when it comes to custom coding and design-related things.
That being said, I did take a quick look at your site โ I’m not quite sure why your CSS didn’t take effect, but what I would recommend is to go to the very bottom of your theme’s style.css file and add the following bit of code there:
.av-upcoming-event-entry .av-upcoming-event-image {
border-radius: 0 !important;
}
If this does not help, then unfortunately the best step I could recommend from there would be to contact the developer of that widget for further assistance.
Thanks,
George